body,
ul,
ol,
li,
p,
h1,
h2,
h3,
h4,
h5,
h6,
form,
fieldset,
table,
td,
img,
div {
    margin: 0;
    padding: 0;
    border: 0;
}

body {
    background: #fff;
    color: #333;
    font-size: 12px;
    margin-top: 5px;
    font-family: "SimSun", "宋体", "Arial Narrow";
}

ul,
ol {
    list-style-type: none;
}

select,
input,
img,
select {
    vertical-align: middle;
}

a {
    text-decoration: none;
}

a:link {
    color: #009;
}

a:visited {
    color: #800080;
}

a:hover,
a:active,
a:focus {
    color: #c00;
    text-decoration: underline;
}

html,
body {
    height: 100%;
}

.main {
    overflow: hidden;
    position: relative;
    height: 100%;
    width: 100%;
    background-color: #ffe;
}

.start {
    display: inline-block;
    position: absolute;
    bottom: 5em;
    left: 50%;
    margin-left: -150px;
    /* transform: translateX(-50%); */
    border-radius: 20em;
    text-align: center;
    background-color: pink;
    color: white;
    font-weight: bold;
    font-size: 40px;
    width: 300px;
    height: 60px;
    border: none;
    outline: none;
    animation-Delay: 0.4s;
    animation-duration: 2s;
    cursor: pointer;
}

.bg {
    text-align: center;
    height: 100%;
    width: 100%;
    display: none;
    overflow: hidden;
}

.show {
    display: block !important;
}

.bg img {
    height: auto;
    width: 100%;
    position: relative;
    top: 50%;
    transform: translateY(-50%);
}

.start:hover {
    transform: scale(1.1);
}

.mytitle {
    position: relative;
    top: 5em;
}

.counter {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 60em;
}